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Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

To: topband@contesting.com
Subject: Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation
From: N4ZR <n4zr@comcast.net>
Date: Fri, 13 Sep 2019 14:23:09 -0400
List-post: <mailto:topband@contesting.com>
Rick, I misled you with the reference to low-angle radiation. I'm broadly aware of how ground conductivity in the Fresnel zone works.  What I'm interested in doing is characterizing how much my signal improves as I add radials - sort of like a distant field-strength meter.

73, Pete N4ZR
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On 9/13/2019 12:39 PM, Richard (Rick) Karlquist wrote:
On 9/13/2019 6:31 AM, N4ZR wrote:
I don't think I've ever read anything on this topic.  Basically, what I'm asking is, could ground wave to a fairly nearby Skimmer be used as an analogue to low-angle radiation to assess the effectiveness of radial systems on an inverted L?  W3LPL is about 30 miles from me and has a very capable Skimmer Server-based RBN node.


A radial system has nothing to do with take off angle.
Take off angle is strictly affected by ground conductivity
over a much large area than even a "big" radial field.

If you want to improve your inverted L, change it to a
top loaded vertical (IE "umbrella" wires).  That will make a lot more difference than adding radials.

Rick N6RK
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